code: def test_graphic_group():
      group = opts.GraphicGroup(
          graphic_item={"item": 1},
          is_diff_children_by_name=False,
      )
      expected = {
          "type": "group",
          "diffChildrenByName": False,
          "item": 1,
      }
      assert_equal(expected, remove_key_with_none_value(group.opts))
  
file_path: pyecharts/test/test_graphic.py
imports: import os
  import json
  from unittest.mock import patch
  from nose.tools import assert_equal, assert_in
  from pyecharts.commons.utils import remove_key_with_none_value
  from pyecharts import options
label_desc: Use image node_id 1 for calling a global function with example usage: test_graphic_group() without return types